CentOS 8 : ruby:2.7 (CESA-2021:3020)

high Nessus Plugin ID 152359


New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote CentOS host is missing one or more security updates.


The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2021:3020 advisory.

- rubygem-bundler: Dependencies of gems with explicit source may be installed from a different source (CVE-2020-36327)

- rubygem-rdoc: Command injection vulnerability in RDoc (CVE-2021-31799)

- ruby: FTP PASV command response can cause Net::FTP to connect to arbitrary host (CVE-2021-31810)

- ruby: StartTLS stripping vulnerability in Net::IMAP (CVE-2021-32066)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Update the affected packages.

See Also


Plugin Details

Severity: High

ID: 152359

File Name: centos8_RHSA-2021-3020.nasl

Version: 1.2

Type: local

Agent: unix

Published: 8/9/2021

Updated: 8/9/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2020-36327


Risk Factor: Medium

Score: 6.7


Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:centos:centos:8, p-cpe:/a:centos:centos:ruby, p-cpe:/a:centos:centos:ruby-default-gems, p-cpe:/a:centos:centos:ruby-devel, p-cpe:/a:centos:centos:ruby-doc, p-cpe:/a:centos:centos:ruby-libs, p-cpe:/a:centos:centos:rubygem-abrt, p-cpe:/a:centos:centos:rubygem-abrt-doc, p-cpe:/a:centos:centos:rubygem-bigdecimal, p-cpe:/a:centos:centos:rubygem-bson, p-cpe:/a:centos:centos:rubygem-bson-doc, p-cpe:/a:centos:centos:rubygem-bundler, p-cpe:/a:centos:centos:rubygem-io-console, p-cpe:/a:centos:centos:rubygem-irb, p-cpe:/a:centos:centos:rubygem-json, p-cpe:/a:centos:centos:rubygem-minitest, p-cpe:/a:centos:centos:rubygem-mongo, p-cpe:/a:centos:centos:rubygem-mongo-doc, p-cpe:/a:centos:centos:rubygem-mysql2, p-cpe:/a:centos:centos:rubygem-mysql2-doc, p-cpe:/a:centos:centos:rubygem-net-telnet, p-cpe:/a:centos:centos:rubygem-openssl, p-cpe:/a:centos:centos:rubygem-pg, p-cpe:/a:centos:centos:rubygem-pg-doc, p-cpe:/a:centos:centos:rubygem-power_assert, p-cpe:/a:centos:centos:rubygem-psych, p-cpe:/a:centos:centos:rubygem-rake, p-cpe:/a:centos:centos:rubygem-rdoc, p-cpe:/a:centos:centos:rubygem-test-unit, p-cpe:/a:centos:centos:rubygem-xmlrpc, p-cpe:/a:centos:centos:rubygems, p-cpe:/a:centos:centos:rubygems-devel

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 8/5/2021

Vulnerability Publication Date: 4/29/2021

Reference Information

CVE: CVE-2020-36327, CVE-2021-31799, CVE-2021-31810, CVE-2021-32066

RHSA: 2021:3020